A 10-yeаr-оld child is trаnspоrted tо the emergency depаrtment by EMS after being rescued from house fire. The child has second - and third- degree burns to the neck and upper chest. Singed nasal hairs are noted and soot is found in the nares and oropharyngeal area. The child is receiving oxygen by simple mask at 10 L/minute. SpO 2 upon arrival is 100%. Which of the following should the respiratory therapist do?
A 67-yeаr-оld mаn nаmed Juan presents with urinary frequency, nоcturia, and difficulty starting urinatiоn. Physical examination reveals an enlarged prostate, but laboratory studies and imaging show no evidence of invasion into surrounding tissues or metastasis. His provider explains that the condition is common in aging men and is characterized by an increase in the number of normal prostate cells. The patient asks whether he has cancer. The patient's symptoms are primarily caused by:
Mаrk, а 55-yeаr-оld man, has smоked оne pack of cigarettes daily for 30 years. During a routine examination, his physician explains to him that over time, smoking can cause the cells in the breathing passages to change and become unhealthy. A biopsy shows abnormal cellular organization, but the cells have not yet become cancerous. Mark wants to understand whether these changes could eventually lead to cancer. Which cellular adaptation is most likely occurring in Mark’s respiratory tract?
Initiаl Pоst оn Dehydrаtiоn v Overhydrаtion Dehydration v Overhydration Introduction Dehydration, a fluid volume deficit, and overhydration, fluid volume overload, are two inverse conditions that result in the body based on fluid volume intake and the concentration of solutes found within the intracellular fluid (ICF)), interstitial fluid (ISF), and the extracellular fluid (ECF). A brief amount of time will be given to examine the etiology and genetic risk(s), what a physical assessment and clinical manifestations look like, and the current clinical practice standards for diagnostic assessment and treatment of the two conditions as they relate to the health of an individual diagnosed with either state. Etiology and Genetic Risk Dehydration occurs “when the body loses more water than it takes in” (Lewis, 2025). The condition commonly surfaces when a patient has experienced episodes of vomiting, diarrhea, the use of diuretics to increase urine output, excessive sweating (perhaps during heat waves or extended exertion), and/or has had a decreased water intake (Lewis, 2024). While anyone is at risk for dehydration based on a deficit of water intake or excessive loss of water from one of the things mentioned above, there is interestingly a genetic risk for dehydration. Often, the risk stems from inherited conditions that affect fluid retention, thirst mechanisms, or electrolyte balance. One such condition is a rare disorder termed dehydrated hereditary stomatocytosis, a congenital disorder affecting red blood cells, also known as hereditary xerocytosis, which acts an an autosomal condition causing cellular dehydration (Frederiksen, 2019). Overhydration occurs “when the body takes in more water than it loses” (Lewis, 2024). This condition commonly surfaces when a patient, particularly athletes, drink excessive water in an effort to avoid dehydration (Lewis, 2024). Perhaps, a patient may drink excessive water as a result of a psychiatric disorder called psychogenic polydipsia, a condition characterized by compulsive water drinking without a physical need (Lewis, 2024). Overhydration itself results from too much water and not enough sodium, and that generally leads to low levels of sodium in the blood (extracellular fluid, ECF), or hyponatremia (Lewis, 2024). Just as in dehydration, while anyone is at risk for overhydration based on an excess of water intake, there is interestingly a genetic risk for overhydration as well though it is rare. The condition is termed nephrogenic syndrome of inappropriate antidiuresis (NSIAD) and is a genetic mutation in the AVPR2 gene that causes the kidneys to retain water regardless of how much is consumed, leading to overhydration (Feldman, 2005). Physical Assessment/Clinical Manifestations A patient presenting to a healthcare setting who is dealing with dehydration will show signs and symptoms such as dark urine with high specific gravity, depressed fontanelles (if an infant), dry mucous membranes, low urine output, orthostatic hypotension, poor skin turgor, thirst, and weight loss (Capriotti, 2024, pg. 122). Additionally, there are known conditions that cause dehydration and increase water requirements, which include: bleeding, breastfeeding, burns, fever, gastrointestinal (GI) fluid loss, vomiting, diarrhea, hypotension, nephrolithiasis, polyuria, surgical drains, sweating, and tachypnea (Capriotti, 2024, pg. 121). The poor skin turgor talked about by Capriotti on Page 122 “is demonstrated through nonelasticity of the skin. When the skin is pinched, a small tent of the skin remains elevated for a few seconds” (Capriotti, 2024, pg. 122). A patient presenting to a healthcare setting who is dealing with overhydration will show signs and symptoms such as ascites, crackles in lungs, dyspnea caused by pulmonary fluid accumulation, edema (whether ankle or sacral), and weight gain (2 lbs. corresponds to 1 liter of fluid) (Capriotti, 2024, pg. 122). One of the most common causes of fluid volume overload that is observed in a patient with overhydration is heart failure. In heart failure, hydrostatic pressure develops in the bloodstream that pushes fluid out of the pulmonary blood vessels and into the alveolar spaces and the interstitial tissue (Capriotti, 2024, pg. 118). Current Clinical Practice Standards for Diagnostic Assessment and Treatment To physically assess for dehydration, a doctor’s evaluation and the occasional use of blood tests are utilized (James, 2025). The symptoms experienced by a patient are usually enough for a doctor to give a diagnosis, but sometimes blood tests are used in conjunction for patients who present ill, take certain medications, or have certain disorders (James, 2025). If the patient requires around-the-clock monitoring or testing in an emergency department or intensive care unit, medical staff may also employ the use of ultrasound technology or special catheters to assess the severity of dehydration (James, 2025). To treat dehydration, the goal is to replace fluids and electrolytes. In mild cases, drinking a substantial amount of water may be all that is needed (James, 2025). In more severe cases, treatment with intravenous solutions containing sodium chloride (NaCl) may be used rapidly at first and then more slowly as the patient’s condition improves (James, 2025). In physically assessing overhydration, a doctor’s evaluation and the use of blood tests are utilized as well (James, 2024). Doctors make efforts to distinguish between overhydration and increased blood volume by examining the patient for weight gain and signs of edema (James, 2024). Blood tests and urine tests are also employed to check electrolyte concentrations within the body (James, 2024). To treat overhydration, fluid intake is restricted and the cause of overhydration is treated (James, 2024). Fluid intake, when advised by healthcare professionals, is cut back to less than a quart of fluids a day, and after several days, improvement may be seen. Medications that tend to cause overhydration are stopped additionally, and doctors may prescribe diuretics to increase the excretion of sodium and water in the urine output (James, 2024). ReferencesCapriotti, T. & Frizzell, J. (2024). Pathophysiology: Introductory concepts and clinical perspectives. F.A. Davis. https://fhubookshelf.vitalsource.com/reader/books/9781719650533/epubcfi/6/40[%3Bvnd.vst.idref%3Dc07]!/4/2/2/258[box7-4]/22/1:0[%2C%E2%80%A2%C2%A0%C2%A0] Feldman, B.J., Rosenthal, S.M., Gitelman, S.E., Vargas, G.A., Haung, E.A., Matsuda-Abedini, M., Lustig, R.H., Mathias, R.S., Portale, A.A., Miller, W.L., & Fenwick, R.G. (2005, May 4). Archive: Newly discovered genetic disease sheds light on body's water balance. University of California San Francisco. https://www.ucsf.edu/news/2005/05/97696/newly-discovered-genetic-disease-sheds-light-bodys-water-balance Frederiksen, H. (2019). Dehydrated hereditary stomatocytosis: clinical perspectives. Journal of Blood Medicine, 10, 183–191. https://doi.org/10.2147/JBM.S179764 Links to an external site.Lewis, J.L. (2024). Overhydration. Merck Manual Consumer Version. https://www.merckmanuals.com/home/kidney-and-urinary-tract-disorders/water-balance/overhydration Lewis, J.L. (2025). Dehydration. Merck Manual Consumer Version. https://www.merckmanuals.com/home/kidney-and-urinary-tract-disorders/water-balance/dehydration